Attachment plug



Jan, 12., 1926.

L'. D. YAGER ATTACHMENT PLUG Filed Nov. 9. 192.3 3 Sheets-Sheet 1 Jan. 12 1926. 1,569,528

| D. YAGER ATTACHMENT PLUG Filed Nov. 9, 1923 3 Sheets-Sheet 2 Q (J1/mundo@ L. D. YAGER ATTACHMENT PLUG Jan, 12 1926.

3 Sheets-Sheet 5 Filed Nov. 9, 1925 W, y@ il Patented Jan. 12, 1926-.

fUNirEoSTATEs PATENT oFFlca.

LESLIE D. YAGEB, I FORT WAYNE,

.ATTCEMENT Prine.

Application Med November 9,1988. 8erlal No. 673,747. p

trical connectors, and has particular referg ence to a device ofthis kind commonly known as an attachment plug.

A -The primary object of the invention is to provide a multi-vay attachment plug of simple and durable form, and having the parts thereof arranged in a compact manner, whereby the device may meet with all .of the requirements for a successful commercial use..

Another object of the invention is to provide a five-way attachment plug, by the use of which numerous translatlng devices may be quickly tapped into the circuit of an electric lamp associated with the plug.

Another lobject is to rovide a particular im roved organization of elements for provi 'ng a five vway attachment lug that may be manufactured and assemblJed with comparative ease and at a low cost.

80 A still further object of the invention is to/provide a construction of five-way attachment plug wherein readily dismantling t e same when required for purposes of perusal or repair of parts of the same.

With the above general objects in view, and others that will become apparent as the 'nature of the invention is better understood, the same consists in the novel form, combination, and arrangement of parts, herein after more fully described, shown in the accom anying drawing? and claimed.

In t e drawings, w erein like reference characters indicate corresponding parts throughout the several views:

Fi re I is a side elevational view of an "attac ment plug constructed .in accordance with the present invention.

Figure 2 is an end elevational view of the device shown in Fi re- 1 looking toward the lamp socketthereo l). Yaourt,

provision is made for' Figure 3, is a view similar to Figure 2, looking toward the other or plug end ofthe device.

Figure 4.- is a longitudinal sectional view taken substantially upon the line iL-4 of Figure 2. l

Figure' 5 is a itransverse sectional view taken substantially upon the line 5-5 of Figure 1.

igure 6 is a view similar to Figure 5, taken on the line 6--6 of Figure 1.

Figure 7 is a transverse sectional view, taken'on the line 7-7 of Figure 1.

Figure 8 is a perspective view of one of the receptacle terminals and its attached conducting strip as the same appears before the ends of said conducting str1 are-bent.

Figure 9 is a view similar to igure 8, of another ofthe receptacle terminals andv its conducting strip.

Figure 10 is a perspective view of the insulating plate emplo ed between the sections of the body of the p ug.

Figure 11 is a developed perspective'view illustrating the relationship of the receptacle terminals and their conducting strips in the assembled plugs.

Figure 12 is a fragmentar perspective view of the bolts whic hold t e sections of the plug assembled and forms the central contact of the lamp socket and plug member, and f Figure 13 is a longitudinal 'sectional view taken"substantia1ly upon the line 13-13 of Fi re 2.

p ferring more 1n detail to the drawings,

' the form of the invention shown includes a body member of insulating material formed in longitudinal half sections 5 and 5 that are arranged in end to end relation, and have an insulating plate 6 interposed therebetween.l The body sections 5 and 5 have pairs of transverse-recesses or grooves 7 and 8 respectively in the adjacent or inner ends thereof, and said sections are so related as to have the recesses of one of the same extend in a direction at right angles to those in the other section, the recesses or grooves 7 and 8 being extended to open at opposite sides of theirrespective sections so as to present a pair o. openings in each side of the rectangular body for reception of the jackof cooperating attachment plugs.

The central portions of thegrooves or recesses 7 are widened andl arranged .within the widened portions thereof are receptacle terminals 9 that are double ended and preferably constructed of substantially C- shape from strips of sheet metal so as to form sprin contacts for engagement with the jacks 0% a cooperating attachment plug inserted in!either' end of the grooves 7 at opposite sides of the plug. In a like manner, the recesses or grooves 8 havetheir central portions widened for reception of a pair of double ended receptacle terminals 10similar to the terminals 9, whereby the jacks of a cooperating attachment plug may be inserted in either of the remaining two sides of the plug body for cooperation with said terminals 10. It will thus be noted that the pairs of contacts 9 and 10 cross each other and are insulatedv from each other by means of the disc 6 interposed between the adjacent ends of the body sections 5 and 5 as clearly shown in Figures 1, 4, and 13.

At one end of the body of the plug is a lamp socket composed of an outer shell or sleeve 11 of insulating material within which is suitably rigidly secured the threaded conducting shell or socket member 12 into which the base of an electric lamp is adapted to be threaded in a well known manner, the outerends of the insulating tube or cylinder 1l being externally threaded as at 13 for detachable engagement with a shade or the like if it is desired to employ one in conjunction with the lamp engaged with the lamp socket.

Positioned at the other end of the body is a lug member including a core 14 of insu ating material that is fitted within a threaded conducting shell 15 adapted to be screwed into the threaded socket of a fixture. The sections of the body are firmly clamped together against opposite sides of the disc G, and the lam socket and screw plug are similarly rigi ly secu-ed against the opposite ends of the body by means of a relatively long bolt or screw 16 that is arranged axially o'l the plug and extends through aligned openings in the botl oms of the shells l2 and 15 and through aligned openings in the body sections 5 and 5 and in the core 15 of the threaded plug. Arranged between the head of' the bolt 1G and the bottom of' the shell 12 is a disc 17 of insulating material, and between the head of the bolt 16 and the disc 17 is one end of a resilient central contact 18 of the lamp socket,the bolt 1G passing through lsaid end of the contact 18 and the outer end of the latter overlyn the head of the bolt 16 as shown clearly 1n Figure 4. Thus, the shell 12 forms the outer contact of the lamp' socket, while the contact 18 is the central contact thereof, -and as the bolt 16 extends through the core 14`of the threaded plug, said bolt forms the central contact of said threaded plug. Anut 19 is threaded upon the-end of the bolt 16 that projects through the core 111, so as to tightly detachably maintain the parts in assembled relation.

One ot' each ofthe pairs of contacts 9 and 1() has a conducting strip 2,0 rigid therewith and these two conducting strips extend entirely through aligned passages in the body sections 5 and' 5 terminating in inturned opposite ends 21 respectively iiatly engaging the inner surfaces of the bottom walls of the shells 12 and 15. In this way, provision is made vfor conducting the current from the shell 15 or outer contact of the screw plug to one receptacle terminal of each pair and also to the shells 12 for outer contact of the lamp socket.

'lhe remaining receptacle terminal of one pair has a conducting strip 22 rigid with the central portion thereof that extends through a passage in the body section 5 and terminates in an inturned end 23, having an opening. 24, through which the bolt 16 passes, the bolt fitting in said opening 24 suliiciently tight to provide electrical connection between the strip 22 and the bolt 16. A disc 25 of insulating material is disposed on the shank of the bolt 16 between the adjacent inturned ends 21. of the stri 2O and the inturned ends 23 ot' the conducting strip 22, so that current may not flow from the shell 12 to the conducting strip 22 and so that current may not How from the central contact or the bolt 16 to the conducting strip 20. l

The remaining receptacle terminal of the other pair has a conducting strip 26 rigid with the central portion thereof and extended through a passage in the body section 5 with its outer end inturned as at 27 and formed with an opening 28- through which the shank of the bolt 16 passes. An insulati disc 29 is disposed between the end 27 o the strip 26 and the adjacent inturned end 21 of the strip 20, so as to insulate them from each other and to particularly insulate the end 27 from the base ci' the shell 15, the opening28 being suliiciently small to provide for electrical connection at this point between the strip 26 and the bolt 16.

It will thus be seen that electrical connection is provided between the outer contacts of both the lamp socket and the screw plug and one receptacle terminal ot each pair, while similar connection is provided between the central contact of both the lamp socket andpscrew plug and the remaining receptacle terminal of each pair, whereby the jacks of a cooperating attachment plug maybe engaed with the end of either paii` otrecepta e terminals to supply current toaxy idelOl sred form of translating device, while a lamp is employed in the lamp socket. In other words, an attachment plug may be engaged with the receptacle terminal at all four sides of the device for simultaneous use if desired at which time a lamp may be employed within the socket shell 12 if so desired.` While the strips 20, 22 and 26 are shown as separate pieces of metal riveted as at 30 to the receptacle terminals 9 and 10, it is obvious that the same may be stamped from sheet metal integral with said terminal.

As shown in Figure 12, the bolt 16, may

' be formed with burrs on opposite sides of the shank thereof, adjacent its head, so that when the bolt 1s forced through the opening 24 of the strip 22, said burrs will bite into the strip 22 for obtaining better electrical connection andto restrain the bolt 16 against turning when it is desired to remove the nut `19 in dismantling the device, or holding thesaid bolt against turning when threading the nut 19 in assembling of the device.

In' the operation of the device, we will assume that the threaded plug including the shell 15 is screwed into the threaded socket of a fixture. When this is done, the adjacent end of the screw 16 will engage the central contact of said fixture socket while the shell 15 will engage the outer contact or shell of said socket. Assuming that the current flows from the central contact of the and then to the outer contact of. the lamp.,

From the outer contact of the lamp, the current will iow through the shell 12 and strips 20 to the shell 15 and then through the outer contact or shell of the: fixture socket. Should the jack of a cooperating attachment` plug be inserted in the grooves 7 at either of the two sides ofthe device, through which said` grooves 7 open, the current will flow from the receptacle terminal 9 to which the strip 22 is attached to one of said jacks and return' from the other jack to the other receptacle terminal 9 to which one of thev strips 20 is attached. In a like manner, should the jack of a cooperating attachment plug be inserted in the ad'acent ends of the g Thus, the jacks of as many as four cooperating attachment plugs may be simultaneously attached with the present attachment plug for simultaneously supplying current to four individaul translating devices, one of which is connected with the jacks of each of said cooperating attachment plugs. It will also be noted that a lamp may -be employed in the socket including the shell 12. simultaneously with the use of'sad cooperating attachment plug or independently thereof and vice versa.

lIn order to prevent turning of the contact shells 12 and l5 relative to the body sections 5 and 5 and in order to obtain better electrical .connections between said shells 12 and 15 and the' conducting strip 20, tongues 32 are stamped from the bottom of said shell in proper position to project yinto the passages through which the strips 20 extend as shown clearly in Figure 13.

As shown in Figure 10, the insulating plate 6 is provided with plugs'or openings 33 and 34, the openings 33 being provided in position to permit passage of strip 20 therethrough and the slots 34 being provided to permit` passage of the screws 16.

From the above description, it is believed that the construction and operation, as well as the 'advantages of the present device will be readily understood and appreciat-v ed by those skilled in the art.

Minor changes may be made without departing from thel spirit and scope of the invention as claimed.

What I claim as new is:

1. In a multi-way attachment plug, a

Hbody of insulating material having a threaded lamp socket ,and a threaded plug respectively positioned at opposite ends thereof, said socket and plug having cen- Atral and outer contacts, two crossed pairs of receptacle terminals within the body,

the receptacle terminals of each air being double-ended for engagement o jacks of a cooperating attaching plug at either of two opposed sides of thebody, a pair of conducting strips extending through the body and each attached to one receptacle terminal of each of said pairs, a bolt extending through the body` and electricallyconnecting the central contacts of the socket and plug, and 'additional conducting strips extending into the body and electrically connecting said central contacts with the remaining receptacle terminal of each pair, said first named conducting strips affording vthe electrical connection between the outer Contact of the plug*l andv socket respectively.

2. In a multi-wayA attachment plug, a body of insulating material having a threaded lamp socket and a threaded plu respectively positioned at opposite ends 1ereof, said socket and plug having central and outer contacts, two crossed pairs of y &

receptacle terminals Within the body, the

receptacle terminals of each pair being double-ended for envegement of jacks of a cooperating attaching plug at either of two opposed sides of the body, a pair of conducting strips extending through the body and each attached to one receptacle terminal of each of said pairs,- a bolt extending through the body and electrically connecting the central contacts of the socket and plug, additional conducting strips extending into the body and electrically connecting said central contacts with the remaining receptacle terminal of each pair,

l5 said first named conducting strips affording Leeaooe vseid body being formed of longitudinal halfsections and having transverse pairs of parallel spaced cross grooves in the adjacent I ends thereof in which the aforesaid receptacle terminals are arranged, an insulating disc arranged between 'the adjacent ends of the body section and insulatin the pairs of receptacle terminals' from eac other, said bolt being associated Withthe socket and plug in a manner to connect these parts to the opposite endsof said body.'

lln testimony whereof aix my signature.

LESLIE D. YAGER.' 

